The gearbox in a village hand pump, after nine years

Donated unit · surveyed Feb 8, 2026

• Independent dimensional survey
• Empirical teardown analysis

What you may do with this

No licence and no authorization. The survey is the publisher's own measurement of hardware they bought, and any patent or trade-dress question in your manufacturing jurisdiction is still yours to answer.

What the methods prove

• Independent dimensional survey

  Dimensions measured off the unit, then redrawn from those measurements.

• Empirical teardown analysis

  The unit disassembled and recorded part by part.

Everything published here is the publisher’s own measurement of a legally acquired, off-the-shelf commercial unit. Qatoto does not host manufacturer-internal documents and makes no clearance assessment of its own.

Report an IP concern about this teardown→

Publisher attested on Feb 12, 2026 that the unit was lawfully obtained, that the data was gathered by measurement and standard disassembly, and that no vendor-confidential material was used.